Poulan Pro PP4620AVL Instruction Manual page 15

Exhaust Outl_ tlet Cover
Exhaust Outlets must face
chain brake (bar side) of chain saw
9. Inspect the muffler gasket and replace if
damaged.
10. Reinstall backplates, muffler gasket and
muffler using muffler bolts. Tighten until
secure.
11. Reinstall bolt cover and Iocknut.
12. Reinstall the spark plug boot.
13. Reinstall the cylinder cover and 3
screws. Tighten securely.
CARBURETOR ADJUSTMENTS
_t WARNING: The chain will be mov-
ing during most of this procedure. Wear your
protective equipment and observe all safety
precautions. The chain must not move at idle
speed.
The carburetor has been carefully set at the
factory. Adjustments may be necessary if
you notice any of the following conditions:
• Chain moves at idle. See iDLE SPEED-T
adjusting procedure.
• Saw will not idle. See IDLE SPEED-T ad-
justing procedure.
Idle Speed-T
Allow engine to idle. If the chain moves, idle
is too fast. Ifthe engine stalls, idle is too slow.
Adjust speed until engine runs without chain
movement (idle too fast) or stalling (idle too
slow).
• Turn idle speed screw (T) clockwise to in-
crease engine speed.
• Turn idle speed screw (T) counterclock-
wise to decrease engine speed.
If you require further assistance or are unsure
about performing this procedure, contact your
authorized service dealer or call
1-800-554-6723.
BAR MAINTENANCE
If your saw cuts to one side. has to be forced
through the cut. or been run with an improper
amount of bar lubrication it may be neces-
sary to service your bar. A worn bar will dam-
age your chain and make cutting difficult.
After each use. ensure ON/STOP switch is
in the STOP position, then clean all sawdust
from the guide bar and sprocket hole.
To maintain guide bar:
• Move ON/STOP switch to the STOP posi-
tion.
• Loosen and remove chain brake nuts and
chain brake, Remove bar and chain from
saw,
• Clean the oil holes and bar groove after each
5 hours of operation,
Remove Sawdust From _
Guide Bar G_OV_
Oil Holes • a
• Burring of guide bar rails is a normal
process of rail wear. Remove these burrs
with a flat file.
• When rail top is uneven, use a flat file to re-
store square edges and sides.
T_ File Rail Edges_ r] r]
and Sides I U I
Square [ ]
Worn Groove Correct Groove
Replace guide bar when the groove is worn,
the guide bar is bent or cracked, or when
excess heating or burring of the rails occurs.
If replacement is necessary, use only the guide
bar specified for your saw in the repair parts list
or on the decal located on the chain saw.
CHAIN SHARPENING
Chain sharpening is a complicated task that
requires special tools. We recommended
you refer chain sharpening to a professional
chain sharpener.
IGNITION TIMING
Ignition timing is fixed and nonadjustable.
SPARK PLUG
The spark plug should be replaced each
year to ensure the engine starts easier and
runs better.
1. Loosen 3 screws on cylinder cover.
2. Remove the cylinder cover.
3. Pull off the spark plug boot.
4. Remove spark plug from cylinder and
discard.
5. Replace with Champion RCJ-7Y spark
plug and tighten with a 3/4 inch socket
wrench. Tighten securely. Spark plug
gap should be 0.025 inches.
6. Reinstall the spark plug boot.
7. Reinstallthe cylinder cover and 3 screws
Tighten securely.
Spark Plug Boot
STORAGE
WARNING:
Stop engine and allow
to cool, and secure the unit before storing or
transporting in a vehicle. Store unit and fuel
in an area where fuel vapors cannot reach
sparks or open flames from water heaters,
electric motors or switches, furnaces, etc.
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